Your "translation" is clearly out of tone for Hacker News.
Both sides play identity politics, they just focus on different identities. Most people are blind to the identity politics of their own party because those identities feel natural or correct to them, making the identities less obviously visible. (Or, inversely, the identities of the 'other' party feel obviously wrong, making them more jarring and stand out as 'playing identity politics'.)
Tone is relative. Although the words individually are not incindiary, the post being replied to was equally incindiary in nature. Subtlety in verbal attacks does not have true distinction, other than one having (weak) deniability of malevolence. Arguably, it’s because of this it is more dishonest.
Both sides play identity politics, they just focus on different identities. Most people are blind to the identity politics of their own party because those identities feel natural or correct to them, making the identities less obviously visible. (Or, inversely, the identities of the 'other' party feel obviously wrong, making them more jarring and stand out as 'playing identity politics'.)